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 > Will Honda 2000 supply MSH 3012's charger?

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GordonThree

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Posted: 09/12/17 04:44pm Link  |  Quote  |  Print  |  Notify Moderator

More amps only affects bulk. It won't speed up absorb or float those are constant voltage.


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camperguy99

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Posted: 09/12/17 04:46pm Link  |  Quote  |  Print  |  Notify Moderator

I think the Magnum has power factor correction giving you a leg up on using it. I often use my EU2000i with the 100 amp Magnum MS2012 dialed down to about 60-70 amps. Just takes longer. Since I think you own the Honda I'd try that for a few trips.

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Posted: 09/12/17 04:47pm Link  |  Quote  |  Print  |  Notify Moderator

MrWizard wrote:

I don't know where/why you keeping typing 100vdc
do you mean 100 AMPS dc ?

the magnum line is smart, set it to 12 amp input power ( PianoTuna does this all the time )

and it will work off the honda 2000, you wont get full max charge rate

with 12a *120v input 1440w, you will get approx 1200w charge approx 80 amps

depending on the batteries approx 5-6 hours to get near 100% in the high 90% range

i have a 675 ampHr AGM bank and typically use 150ampHrs over night during the summer with all the fans and the fridge


yes, I mean 100 amps dc. Thanks for the correction :-)

I have the RC 50 controller for the magnum and the "shore power" settings are in 5 increments. Just checked. I can select 10 or 15.


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Posted: 09/12/17 05:48pm Link  |  Quote  |  Print  |  Notify Moderator

set the charge rate to 80%, which is normally the mfg recommended rating.


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Posted: 09/12/17 05:49pm Link  |  Quote  |  Print  |  Notify Moderator

By the way, if you set the shore power to 15 Amps, the Mag. will use only about 5 amps of the A/C.

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Posted: 09/12/17 06:11pm Link  |  Quote  |  Print  |  Notify Moderator

camperguy99 wrote:

I think the Magnum has power factor correction giving you a leg up on using it. I often use my EU2000i with the 100 amp Magnum MS2012 dialed down to about 60-70 amps. Just takes longer. Since I think you own the Honda I'd try that for a few trips.


At least somebody was paying attention to all the info provided a while back about matching gens to chargers and the importance of PF correction!

ISTR threads saying you can take longer to recharge an AGM at lower than max amps as long as you meet the voltage specs which will take longer to get to. It is just a longer run of gen time.

Plus as mentioned above, you will only be recharging to about 90% SOC on gen anyway (doing say 50-90s) so the real issue is getting them to 100% ASAP once that series of 50-90s is over with.

Getting AGMs to 100% is a whole other story, being about how many amps they accept at a certain voltage with no load on the battery. You need an ammeter and voltmeter and a way to isolate the AGM from all loads.


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pianotuna

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Posted: 09/12/17 09:08pm Link  |  Quote  |  Print  |  Notify Moderator

Care to expand on that? I don't find that to be so.

gatorcq wrote:

By the way, if you set the shore power to 15 Amps, the Mag. will use only about 5 amps of the A/C.



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pianotuna

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Posted: 09/12/17 09:10pm Link  |  Quote  |  Print  |  Notify Moderator

The Magnum will do 125 amps of charging on 15 amp shore power.

My generator can do 23.3 amps. If I limit the Magnum to 23 amps and the battery bank is truly hungry the Magnum goes to 127 amps and shuts down.

pianotuna

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Posted: 09/12/17 09:24pm Link  |  Quote  |  Print  |  Notify Moderator

outwestbound,

No one uses a generator to get to 100% state of charge unless they have no choice. Generators are great for heavy loads but lousy for charging house batteries.

You have four batteries. Set it up to be able to split the banks. Use the 960 watts to fully charge one bank while using the other.

Alternately since you have two charge controllers use one on each bank--but draw from only one "set", so that the other can get to 100% soc.

Or you can do as BFL13 does. He bulk charges from his generator to 85% state of charge and then lets the solar bring the bank up to fully charged.

I don't have enough solar to run the heavy devices I wish to use. I'm fortunate to have a remote start generator--so now I turn it on when ever I am cooking and the like. My battery bank (556 amp-hours) gets to fully charged on the 256 watts of solar panels.

If I were going to continue to full time I would do a massive solar upgrade to 48 volts and 1600 watts of panels. But it is not cost effective for me to do so.

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Posted: 09/12/17 09:38pm Link  |  Quote  |  Print  |  Notify Moderator

gatorcq wrote:

By the way, if you set the shore power to 15 Amps, the Mag. will use only about 5 amps of the A/C.


Huh? If plugged into a garage outlet or off a Honda 2000, I've been told to set the shore power down, or the magnum will try to draw too much and blow the breakers at the source. Maybe you could explain this a bit more?

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